package collection2;


import java.util.ArrayList;
import java.util.Collection;

public class CollectionOper1 {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);

        Collection c2 = new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);

        c1.add(c2);
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection c3 = new ArrayList<>();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        c3.add("java");
        System.out.println("c3:"+c3);

        boolean contains = c1.containsAll(c3);
        System.out.println(contains);

//        c1.retainAll(c3);//取交集
//        System.out.println("c1:"+c1);
//        System.out.println("c3:"+c3);

        c1.removeAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);
    }
}
